| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19 37 11.7411 |
| Declination | +28° 29′ 59.5025″ |
| Apparent magnitude (V) | 6.67 |
| Characteristics | |
| Spectral type | G0IV |
| B−V color index | 0.58 |
| Astrometry | |
| Proper motion (μ) | RA: −31.499±0.045 mas/yr Dec.: −80.782±0.046 mas/yr |
| Parallax (π) | 19.2049 ± 0.0309 mas |
| Distance | 169.8 ± 0.3 ly (52.07 ± 0.08 pc) |
| Absolute magnitude (MV) | 3.29 |
| Absolute bolometric magnitude (Mbol) | 3.228 |
| Details | |
| Mass | 1.33 ± 0.07 M☉ |
| Surface gravity (log g) | 4.05 ± 0.22 cgs |
| Temperature | 5983 ± 62 K |
| Metallicity | 0.10 ± 0.08 dex |
| Rotational velocity (v sin i) | 5.5 km/s |
| Age | 4.0 ± 1.0 Gyr |
| Other designations | |
| BD+28° 3412, HIP 96507, SAO 87464 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 185269 is a stellar triple system approximately 170 light-years away in the constellation Cygnus. It is easily visible to binoculars, but not the naked eye.
The primary star is a third more massive and four times more luminous than the Sun. The spectrum of the star is G0IV. About 4.5 arcseconds away are the two other stars, which are much less massive than the Sun. The primary has a mass of 0.165 M☉, while the secondary has a mass of 0.154 M☉.
Planetary system
The Jupiter-mass hot Jupiter was independently discovered orbiting the primary star by two different teams using doppler spectroscopy. One group led by Claire Moutou used the ELODIE spectrograph at the Haute-Provence Observatory in France while John Asher Johnson and collaborators used the Coudé Auxiliary and C. Donald Shane telescopes at Lick Observatory in California. The planet takes 6.8 days to orbit at 0.077 AU from the primary star in an eccentric orbit.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥1.010±0.014 MJ | 0.0770±0.0034 | 6.83776±0.00027 | 0.229±0.014 | — | — |
See also
References
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Moutou, C.; et al. (2006). "ELODIE metallicity-biased search for transiting Hot Jupiters. III. A hot Jupiter orbiting the star HD 185269". Astronomy and Astrophysics. 458 (1): 327–329. arXiv:0707.0958. Bibcode:2006A&A...458..327M. doi:10.1051/0004-6361:20066029.
- "HD 185269". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-19.
- ^ Ginski, C.; et al. (2016). "A lucky imaging multiplicity study of exoplanet host stars – II". Monthly Notices of the Royal Astronomical Society. 457 (2): 2173–2191. arXiv:1601.01524. Bibcode:2016MNRAS.457.2173G. doi:10.1093/mnras/stw049.
- Johnson, John Asher; et al. (2006). "An Eccentric Hot Jupiter Orbiting the Subgiant HD 185269". The Astrophysical Journal. 652 (2): 1724–1728. arXiv:astro-ph/0608035. Bibcode:2006ApJ...652.1724J. doi:10.1086/508255.
- Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0. S2CID 102486961.
External links
- "Notes for star HD 185269". Extrasolar Planets Encyclopaedia. Archived from the original on September 29, 2007.
- "HD 185269". Systemic. 20 April 2007.
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